Premium
Turn on Nanolight in a Tiny Gap
Author(s) -
Kumagai Takashi
Publication year - 2020
Publication title -
vakuum in forschung und praxis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 13
eISSN - 1522-2454
pISSN - 0947-076X
DOI - 10.1002/vipr.202000746
Subject(s) - raman spectroscopy , scanning tunneling microscope , materials science , nanoscopic scale , excitation , optoelectronics , focused ion beam , laser , characterization (materials science) , spectroscopy , optics , surface plasmon resonance , plasmon , nanotechnology , chemistry , ion , nanoparticle , physics , organic chemistry , quantum mechanics
Summary A new low‐temperature scanning tunneling microscopy technique with laser optics allows for optical excitation and spectroscopy at the level of a single atom or molecule. Shape and material of the microscope's tip prove essential for these investigations; thus, the tip is produced with nanoscale precision by Focused Ion‐Beam milling. The localized surface plasmon properties of the tips are engineered by altering the tip structures providing spectral tunability. Local optical excitation is performed by a wavelength‐tunable laser source. This tip‐enhanced resonance Raman spectroscopy provides a new approach for the atomic‐scale optical characterization of local electron‐phonon coupling and could ultimately lead to new nanoscale optoelectronic devices with exceptional high sensitivity and efficiency.